Hellzero

I've been looking at it and I still don't know where the heck is the output jack on this steampunk machine?!?

Don't look any further @Happy Jack, here is one totally functional and at a very decent price: https://www.bassic.de/kleinanzeigen/woodhead-steampunk.53687/

You can also wax your pickup to minimise the feedback: remember what happened when holding it (with your fingers I guess) outside the bass body.

Which is almost normal, add distortion at this volume and it'll start feeding back which is also almost normal for a feedback machine aka a hollow body instrument. Try starting with the master volume at zero (and lower your gain a bit too as it will help containing the feedback) and go up until the non return point.

Ok. Any hollow body instrument will feed back at this really high volume. Try to start with the master at zero and go up until it starts feeding back, then you'll know you've reached the non return point. It reminds me of a friend having huge feedback issues with his guitar equipped with EMG's and after trying everything at my home and having no feedback at all I decided to go a step further. I came to his home when they were rehearsing and everything became crystal clear: less than one meter away from a full stack Mesa Boogie at stadium concert level in a 20 square meter room with a crazy drummer and a full stack SVT at delirious level too... 🫣😳🤦 No need to say that this friend and his drumming brother are now almost deaf as they continued to play at amazingly high level. The bassist stopped playing with them a few weeks later and can still hear normally today.

Ok, I think I understood your issue. How loud are you and in what room size are you in when you engage that overdrive with your Jack Casady bass?

Did you try a simple signal chain? Bass > OD > amp.

So you have a pedalboard... How many pedals do you have on it and how are they wired?

And are you going straight to the amp or using the effects loop with your pedal?

To me it looks like the pedal is the culprit, not the bass, as you seem to generate a feedback loop with your amp. You can try to remove the grounding in your pedal. Did you try another overdrive, except the TC Electronic, of course?

Stunning would I dare to say!

Nice way to do the fret dressing under tension, way faster than using the Stewmac bench and all the gauges. Very very very few luthiers do that fret dressing under tension and the only one I know is Leduc who is also doing a differential dressing (the treble side is straighter than the bass side) aka B-Bow when done by the Dobbratz brothers (Le Fay basses). Again congratulations for your excellent work @honza992!

As @tauzero is mentioning the black battery negative wire goes to the ring of the output jack which is the shortest connector. The blue output wire goes to the tip which is the longest connector. I think you've reverted those two. The ground goes to the sleeve.

Forget Musikraft it's a lotery and look at Warmoth or Shuker. My Nash PB-63 has a Lollar pickup with a gold anodised pickguard and Gotoh aged hardware including Res-O-Lite tuners: simply put the best P-Bass I've ever owned (and I've owned as many as the years I've been looking for THE P-Bass, so at least 40).

He recorded a few albums that are as boring as you would imagine. On the other hand, he's making a lot of money (way more than when he was a luggages handler in a London airport) and it's a good thing for him. At least he's earning money thanks to music, which is very difficult. So congratulations for this!

You seem to have forgotten the Joe Dart models, and the Nate Mendel Sterling by Music Man model too @drTStingray... 😉

Yes to all questions.

It's close to a Brazilian rosewood sound wise. You can hear it here, Jack: https://tonybertrand.bandcamp.com/track/i-wish-i-was-swiss

Stainless steel would be better @JPJ, like my Le Fay.

Superb work @Andyjr1515 !

Here are the G&L 1000 and 2000 wiring diagrams.

... 😉🤔😉